SSD not getting 6 Gbps speed even when plugged into a SATA 3 port

coolcolek44 · Sep 17, 2015

Hi,

Just picked up a 120 GB Samsung 850 EVO SSD and a SATA 3 cable (http://www.amazon.ca/gp/product/B009GUKOH4?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00) However I am only getting SATA 2 speeds even though it is plugged into a SATA 3 port on the MoBo. Is there something I need to do or some driver I need to install to utilize the SATA 3 port on the motherboard? Thanks in advance!

Calculagator · Sep 17, 2015

Before you change settings/install new drivers, how do you know you are only getting SATA 2 speeds?

USAFRet · Sep 17, 2015

Given a Samsung drive, post a screencap of the Samsung Magician performance test, showing that drive.

geofelt · Sep 17, 2015

You should get sata 3 speeds when plugged into an Intel sata 3 adapter port.
Other sata adapters are not as efficient.
Exactly what motherboard and port are you using?
Are your motherboard drivers current and the ones designed for the sata adapter you are using?

bgunner · Sep 17, 2015

IF there is a SATA driver available for your motherboard you would find it on the Motherboard makers web site in downloads for your board. These usually only apply when you have a second SATA 3 controller to expand your SATA amount on the board.

An SSD will not saturate the 6 GB/s speed of a SATA 3 connection, heck it wont saturate SATA 2 either. Why do you believe you are only getting SATA 2 speeds of 3GB/s throughput?

coolcolek44 · Sep 17, 2015

Calculagator :

I know I am getting SATA 2 speeds becuase I ran benchmarks in both the Samsung Magician tool and a couple other 3rd party benchmarking programs.

USAFRet · Sep 17, 2015

coolcolek44 :

1. Please show us a screenshot of that Magician window.
2. Are you plugged into an Intel port, or a Marvell port? It makes a difference.

coolcolek44 · Sep 17, 2015

bgunner :

Here is a screenshot of the Samsung Magician thing says: http://imgur.com/AHrD4o3

Calculagator · Sep 17, 2015

coolcolek44 :

It would be quite helpful in diagnosing your problem if you would share those results.

The answer to your original question is: no-there is nothing you need to do and no driver you need to install for SATA 3 speeds. A driver might enable some feature or give a very minor speed bump, but nothing like the difference between SATA 2 and 3. Something else is going on.

coolcolek44 · Sep 17, 2015

USAFRet :

coolcolek44 :

1. Please show us a screenshot of that Magician window.
2. Are you plugged into an Intel port, or a Marvell port? It makes a difference.

1. http://imgur.com/AHrD4o3
2. I believe it is an intel port.

coolcolek44 · Sep 17, 2015

Calculagator :

coolcolek44 :

It would be quite helpful in diagnosing your problem if you would share those results.

The answer to your original question is: no-there is nothing you need to do and no driver you need to install for SATA 3 speeds. A driver might enable some feature or give a very minor speed bump, but nothing like the difference between SATA 2 and 3. Something else is going on.

Here is a screenshot of the benchmarks in the tools as well as the problem that says that it is plugged in a SATA 2 port even though its in a SATA 3 port http://imgur.com/AHrD4o3

USAFRet · Sep 17, 2015

coolcolek44 :

USAFRet :

1. http://imgur.com/AHrD4o3
2. I believe it is an intel port.

That result is very close to what I get with a 250GB 840 EVO, plugged into a Marvell port.
Significantly slower than an identical drive plugged into a native Intel port.

coolcolek44 · Sep 17, 2015

This is my mother board:
http://support.hp.com/ca-en/document/c03132942
My SSD is plugged into the yellow SATA port near the bottom right of the picture which is a SATA 3 port (i think lol).

geofelt · Sep 17, 2015

What is your motherboard?
Which port is used?
On some motherboards, not all the ports are sata 3.
The magician report indicates you are not using a sata3 port, and that there are some available.
You may not have the motherboard manual available.
But, the Z75 chipset can give 4 sata ports, of which only 2 are sata 3 and 2 are sata 2.
Just change to a different port and retest.

XaveT · Sep 17, 2015

Plug it in to either the blue or white one on the bottom. Those are SATA3. The others are SATA2.

Calculagator · Sep 17, 2015

I can't quite see enough detail in HP's picture, but it looks to me like the SATA3 ports are the red and black on the side.
4 ports are SATA2 (ports 2-5)
2 ports are SATA3 (ports 0-1)

coolcolek44 · Sep 17, 2015

Yea im an idiot lol. I plugged it into the SATA port labelled SATA 3 thinking that meant it was SATA III as in 6.0gbps but ONLY SATA 1 and 2 on the MOBO supported 6.0gbps lol, thanks for the answers

bgunner · Sep 17, 2015

sata ports 0 and 1 are sata 3. Sata ports 2-5 are sata 2. Says very clearly in your link for your board under "I/O Ports and internal connectors" and then "Internal connectors".

SSD not getting 6 Gbps speed even when plugged into a SATA 3 port

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